Antislip surface and method of making the same



gmyi' usm 97 F. J. TONE ET AL ANTISLIP SURFACE AND METHOD OF MAKING THE SAME FiledMay 25. 1922 m T/n'n Rough Cooling at Ceramrk Mafer'l'ul.

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f 'u'Ni'ran STATES PATENT: OFFICE.

run I. miss Ann nninn L. min mum, or mAoAnA FALLS, NEW 12031:, As-

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. OOBYOBATION OF PENNSYLVANIA.

mien? sum-Aer. Am Jamison or MAKING ran sAirn.

lpplication filed To all 'whomitmayaoncem:

Be it. known that we, FRANK J. Tom: and MINER L. HARTMANN, both residents of 'Ni-. agara Falls, Niagara Gounty, New York, I have invented a new and useful Improvement in Antislip Surfaces and Methods of. Making the Same, of which the following is a' full, clear, and exact description.

Our invention relates to the use. of abra- 1 sive grains in autislip floor or tread surfaces. Heretofore it has been roposed to emgloy grains of ,abrasives, suc as silicon car ide or grains of aluminous abrasives in connection with treads or floor surfaces of concrete, 1 terrazzo, etc., to give 'antislip PIOPGItIGS thereto.

Our invention relates to this sub ect, and is especially designed to improve the adhesion between the abrasive-gra ns aiidthe 7 80 matrix. In practice, it has beenfound that when untreated abrasive grains are embedded in such surfaces, they are apt to pull or work out of the'cement or concrete after a certain amount of use. Our invention is del5 signed to im rove this-adhesion by increasing the sur ace adhesive qualities of the grains which are embedded in the floor or tread surface. V

The invention will best be understood by reference to the accompanying drawings, in which: A

Figure 1 is a section of an antishpfioor having grains treated in accordanmith-our invention embedded in the surface thereof, and

Figures 2, 3, 4 and 5 are diagrammatic views of individual grains, greatly enlarged, v illustrating'the various methods of treating the grains in accordance with the present in- 40 vention.

In carrying out ourinvention we nay coat the grains with athin eei int, as illustrated in Figure 2, andslet this coating set and harden to improve thewfaie adhesion ualities, orwe may roughen or alter the sur ace of the grains, as for instance, by etching, as illustrated in Figure 3, to give a pitted or roughenedsurface, and thus 1ncrease the bonding gualities. We'ma-y also' a carry out both of these steps, that is, we may etch or roughen the concrete surfaces of the grains and then provide tl gnM wash 1922. Serial at. 563,119.

coat oflontland cement or similar materialto further improve the adhesive qualities, as illustrated in Figure 4.

In actual test, taking the value of untreated aluminous abrasive grains with a binder such as used in fioorin as a value of 100, we find that by using etc ed, pitted or roughened grains, a tensile value is obtained of 150 on account of the increased adhesion. By taking the same grains and providing them with a thiu'wash-o'f cement and letting this coating harden in the usual manner, .the grains so .coated will give a value in the matrix' of about 180 tensile-strength.

By combining thesetwo methods and first etching-'01 pitting the grains' and then coat-v ingthem with afortland cement wash, such grains ma strength 0 about230.

This invention is of' manufacture of antislip oorsurfaces, particularly those using Portland cement or concrete as a binder, as illustrated in'Figure 1. In producing such surfaces, the sub floor is usually made of'a coarseconcrete aggregate 2, and a wearing surface 3 about an inch in thickness composed of equal 'mix- .tures of sand and Portland cement is then laid on the base. The abrasive grains when treated in accordance with our invention, either by pitting, etching or roughenin or by using coated grains 4 or b using fioth methods, may then be sprinkied or sifted in the matriie'give a tensile eat value in the over the surface while it is still wet, preferably in the proportion of about three to five in I which case we preferably mix the abra-- sive grains with the cement or concrete mixture which forms a matrix or bond for, the marble or stone chips and other components of the terrazzo aggregate. After the terrazzo floor is thus formed, whether polished or ground on its surface or not, the abrasive grains appear on the surfaces only in those portions of the aggregate where the mortar or matrix is exposed, this giving an efficient antislipping component to the surface.

Ye may also employ this system in making up the mortar or cement employed in laying ordinary tile or mosaic tile. We may also mix these treated grains with the mortar or cement employed in the setting of glass pieces in vault lights. In fact, the treated grains may be employed in all types of floor or tread constructions or tiles wherein a matrix or cement or mortar is used, to give antislipping properties.

The grains which are treated may be either natural or artificial abrasive grains and the surfaces of the grains may be improved in adhesive properties by methods other than those which we have described. For example, a thin rough coating of ceramic material may be washed or burned on the surface of the grains, as illustrated in Figure 5, or other forms of cement may be em,

ployed similar to the Portland cement wash.

The advantages of our invention will be obvious to those skilled in the art since the pulling or working out of abrasive grains in antislip flooring or tread surfaces is greatly reduced and a more efficient surface provided for continued use.

The nature of the abrasive grains and the method of improving their adhesive qualities may be widely varied, without departing from our invention as defined in the broader claims.

We claim:

1. An antislip floor or tread surface having embedded therein abrasive grains, whose surfaces have been provided with a roughening coating before embedding.

2. An antislip floor formed of an aggregate and having embedded in its tread surface grains which have been roughened and coated prior to placing on the surface of the floor.

3. In the manufacture of antislip tread or floor surfaces, the steps consisting of artificially roughening the surfaces of abrasive grains and then embedding them in at least a part of said surface.

4. In the manufacture of antislip tread or floor surfaces, the steps consisting of providing abrasive grains with a thin adherent coating, and then embedding said grains in a concrete aggregate to form at least the upper portion or tread surface of the floor. 5. In the manufacture of antislip tread or floor surfaces, the steps consisting in artificially pitting, roughening or etching said grains, providing them with a thin adherent coating, and then embedding them in at least a part of the floor or tread surfaces. In testimony whereof we have hereunto set our hands.

FRANK J. TONE. MINER L. HARTMANN. 

